diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-28 01:10:34 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-28 01:10:34 +0300 |
| commit | 9977b1a71488742606376c09e19e0074e4403cdf (patch) | |
| tree | 08d35c71199ea2cd7adef98dd52ef917014d08e7 /fs/9p/vfs_file.c | |
| parent | 568d850e3c6015acec8f854f5be97766497a676b (diff) | |
| parent | aafee43b72863f1f70aeaf1332d049916e8df239 (diff) | |
| download | linux-9977b1a71488742606376c09e19e0074e4403cdf.tar.xz | |
Merge tag '9p-for-5.4' of git://github.com/martinetd/linux
Pull 9p updates from Dominique Martinet:
"Some of the usual small fixes and cleanup.
Small fixes all around:
- avoid overlayfs copy-up for PRIVATE mmaps
- KUMSAN uninitialized warning for transport error
- one syzbot memory leak fix in 9p cache
- internal API cleanup for v9fs_fill_super"
* tag '9p-for-5.4' of git://github.com/martinetd/linux:
9p/vfs_super.c: Remove unused parameter data in v9fs_fill_super
9p/cache.c: Fix memory leak in v9fs_cache_session_get_cookie
9p: Transport error uninitialized
9p: avoid attaching writeback_fid on mmap with type PRIVATE
Diffstat (limited to 'fs/9p/vfs_file.c')
| -rw-r--r-- | fs/9p/vfs_file.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 4cc966a31cb3..fe7f0bd2048e 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -513,6 +513,7 @@ v9fs_mmap_file_mmap(struct file *filp, struct vm_area_struct *vma) v9inode = V9FS_I(inode); mutex_lock(&v9inode->v_mutex); if (!v9inode->writeback_fid && + (vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_WRITE)) { /* * clone a fid and add it to writeback_fid @@ -614,6 +615,8 @@ static void v9fs_mmap_vm_close(struct vm_area_struct *vma) (vma->vm_end - vma->vm_start - 1), }; + if (!(vma->vm_flags & VM_SHARED)) + return; p9_debug(P9_DEBUG_VFS, "9p VMA close, %p, flushing", vma); |